| 1101 | Cyclone Petroleu | | Oil & Gas Operator | Nov 1995 |
| 1102 | Cyclone Petroleum, Incorporated | Jenks, OK 74037 | Oil & Gas Operator | Sep 2025 |
| 1103 | D & A Oil Company | Abilene, TX 79606 | Oil & Gas Operator | Oct 2018 |
| 1104 | D & A Oil Company, A General Partnership | Clearwater, KS 67026 | Oil Operator | Dec 2024 |
| 1105 | D & B Gas Co. | Burden, KS 67019 | Gas Operator | Feb 2001 |
| 1106 | D & D Energy | | Oil Operator | Jul 2023 |
| 1107 | D & F Petroleum | | Oil & Gas Operator | Sep 1990 |
| 1108 | D & G Oil Compan | | Oil Operator | Mar 1988 |
| 1109 | D & I Incorporat | | Gas Operator | Jun 1990 |
| 1110 | D & J Investment | | Oil Operator | Jun 1995 |
| 1111 | D & J Investments | | Oil Operator | Dec 2009 |
| 1112 | D & J Oil Company | Kermit, TX 79745 | Oil & Gas Operator | Feb 2026 |
| 1113 | D & L Energy | Morland, KS 67650 | Oil Operator | Mar 1995 |
| 1114 | D & M Oil, Inc. | Winfield, KS 67156 | Oil Operator | Apr 2001 |
| 1115 | D & R Oil Properties | | Oil Operator | May 1998 |
| 1116 | D & R Oil, Inc. | Galva, KS 67443 | Oil & Gas Operator | Jul 2025 |
| 1117 | D & R Well Service, Inc. | Galva, KS 67443 | Oil & Gas Operator | Sep 2025 |
| 1118 | D & T Oil Company | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 1119 | D & W Oil Compan | | Oil Operator | Jan 1987 |
| 1120 | D & Z Exploration, Inc. | St Elmo, IL 62458 | Oil Operator | Sep 2025 |
| 1121 | D And B Oil | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 1122 | D J Oil Operations | | Oil Operator | Dec 2009 |
| 1123 | D K Oil Services LLC | Wellsville, KS 66092 | Oil Operator | Nov 2019 |
| 1124 | D Oil, Inc. | Victoria, KS 67671 | Oil Operator | Sep 2025 |
| 1125 | D S & W Well Ser | | Oil Operator | Nov 1996 |
| 1126 | D S & W Well Servicing, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2019 |
| 1127 | D U Investments | Salina, KS 67401 | Oil & Gas Operator | Dec 2009 |
| 1128 | D-Oil Incorporat | | Oil Operator | Aug 1990 |
| 1129 | D. E. Exploration, Inc. | Wellsville, KS 66092 | Oil & Gas Operator | Sep 2025 |
| 1130 | D. Jackson Rentals LLC | Easton, KS 66020 | Oil Operator | Sep 2025 |
| 1131 | D. R. Lauck Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jul 2019 |
| 1132 | D.K. Rush Oil Co., LLC | El Dorado, KS 67042 | Oil Operator | Sep 2025 |
| 1133 | D.M. Well Service | | Oil Operator | Dec 2019 |
| 1134 | D.W.S. Properties | Sterling, KS 67579 | Oil Operator | Mar 2006 |
| 1135 | Da Co Petroleum, Inc. | Wann, OK 74083 | Gas Operator | Apr 2003 |
| 1136 | Da Company Petro | | Gas Operator | Jun 1995 |
| 1137 | Da Energy, LLC | Lees Summit, MO 64063 | Oil Operator | Sep 2025 |
| 1138 | Dakota Drilling, LLC | Wichita, KS 67205 | Oil Operator | Feb 2006 |
| 1139 | Dakota Production Co., Inc. | Neodesha, KS 66757 | Gas Operator | Sep 2025 |
| 1140 | Dakota Resources | | Oil & Gas Operator | Jan 1989 |
| 1141 | Dale E. Jackson Production Co. | | Oil Operator | Sep 2025 |
| 1142 | Dalen Resources Oil & Gas Co | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 1143 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 1144 | Damar Resc Incor | | Oil Operator | Oct 1995 |
| 1145 | Damar Resources, Inc. | Hays, KS 67601 | Oil & Gas Operator | Aug 2025 |
| 1146 | Damson Oil Corpo | | Oil & Gas Operator | May 1994 |
| 1147 | Dane G. Hansen Trust | | Oil Operator | Dec 1994 |
| 1148 | Daniels E L Dril | | Oil Operator | Nov 1995 |
| 1149 | Daniels Oil Co. | | Oil Operator | Mar 2025 |
| 1150 | Daniels Petroleu | | Oil Operator | Jan 1991 |
| 1151 | Danranco Limited | | Gas Operator | Oct 1990 |
| 1152 | Darco Petroleum Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Dec 2020 |
| 1153 | Dark Horse | | Oil Operator | Jun 2025 |
| 1154 | Darnall, Walter E. | Chautauqua, KS 67334 | Oil Operator | Dec 2009 |
| 1155 | Darrah John J Jr | | Oil & Gas Operator | Oct 1994 |
| 1156 | Darrah John Jay Jr | Wichita, KS 67201 | Oil & Gas Operator | Jan 2026 |
| 1157 | Darrah Oil Company, LLC | Wichita, KS 67201 | Oil & Gas Operator | Feb 2026 |
| 1158 | Dart Cherokee Basin Operating Co., LLC | Mason, MI 48854 | Oil & Gas Operator | Sep 2025 |
| 1159 | David D. Davis | Benton, KS 67017 | Oil Operator | Dec 2009 |
| 1160 | Davies & Company Inc | Tulsa, OK 74114 | Oil & Gas Operator | Nov 2000 |
| 1161 | Davis & Fitzgera | | Gas Operator | Dec 1983 |
| 1162 | Davis Brothers O | | Oil Operator | Dec 1987 |
| 1163 | Davis Contract Pumping | | Oil Operator | Oct 2000 |
| 1164 | Davis Drilling & | | Oil Operator | Jul 1989 |
| 1165 | Davis Oil Compan | | Oil Operator | Jul 1988 |
| 1166 | Davis Operating Company | Elysian Field, TX 75642 | Oil & Gas Operator | Feb 2026 |
| 1167 | Davis Petroleum | | Oil & Gas Operator | Dec 1996 |
| 1168 | Davis Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Aug 2021 |
| 1169 | Davis William H | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2014 |
| 1170 | Davis, Billy F. | Tulsa, OK 74152 | Oil Operator | Jun 1988 |
| 1171 | Davis, Michael G. | Wichita, KS 67212 | Oil & Gas Operator | Jul 1988 |
| 1172 | Davis, Robert E. | Graham, TX 76450 | Oil & Gas Operator | Apr 1997 |
| 1173 | Davis, Robert W. | Richfield, KS 67953 | Gas Operator | Dec 2010 |
| 1174 | Davis, Travis H., Gas Account | Borger, TX 79008 | Gas Operator | Feb 2015 |
| 1175 | Davis, W.C. Oil Company | Pratt, KS 67124 | Gas Operator | Nov 2008 |
| 1176 | Davis, Wlliam H. | Tulsa, OK 74103 | Gas Operator | May 1998 |
| 1177 | Dawson Resources Inc | Franktown, CO 80116 | Oil & Gas Operator | Mar 2015 |
| 1178 | Dawson-Markwell | | Oil & Gas Operator | Nov 1996 |
| 1179 | Dawson-Markwell Exploration Co. | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2025 |
| 1180 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Feb 2026 |
| 1181 | Daystar Petroleum Inc | Eureka, KS 67045 | Oil & Gas Operator | Sep 2025 |
| 1182 | DB Energy, LLC | Baldwin City, KS 66006 | Oil Operator | Sep 2025 |
| 1183 | DBD Oil, LLC | Emporia, KS 66801 | Oil Operator | Sep 2025 |
| 1184 | DCF Exploration | Lakewood, CO 80215 | Oil Operator | Dec 1989 |
| 1185 | DCP Midstream, LP | Denver, CO 80237 | Oil Operator | Nov 2006 |
| 1186 | De & TZ LLC | Wellsville, KS 66092 | Oil Operator | Sep 2025 |
| 1187 | Dearinger Compan | | Oil Operator | Dec 1994 |
| 1188 | Decab Company | Victoria, KS 67671 | Oil Operator | Aug 1996 |
| 1189 | Dechant Oil Operations, LLC | Hutchinson, KS 67501 | Oil Operator | Aug 2025 |
| 1190 | Deck Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2020 |
| 1191 | Decker Lease Ope | | Oil Operator | Dec 1988 |
| 1192 | Decker Petroleum | | Oil & Gas Operator | Oct 2002 |
| 1193 | Deer Run Oil Lease, LLC | Caney, KS 67333 | Oil Operator | Jul 2025 |
| 1194 | Delaware Dyche Corp. | Hutchinson, KS 67501 | Oil Operator | Jan 2010 |
| 1195 | Delhi Gas Pipeli | | Gas Operator | Aug 1998 |
| 1196 | Delhi Pipeline | | Oil & Gas Operator | Sep 1999 |
| 1197 | Dell-Ray Investments, Inc. | Nickerson, KS 67561 | Oil Operator | Dec 2019 |
| 1198 | Delozier, Orval & Stevens, Floyd, A General Partnership | Dewey, OK 74029 | Oil Operator | Nov 2009 |
| 1199 | Delta Petroleum Company | Houston, TX 77267 | Oil Operator | Aug 1996 |
| 1200 | Delta Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |